Index: libraries/source/spidermonkey/FixMacBuild.diff
===================================================================
--- libraries/source/spidermonkey/FixMacBuild.diff
+++ libraries/source/spidermonkey/FixMacBuild.diff
@@ -1,3 +1,15 @@
+--- a/build/moz.configure/init.configure
++++ b/build/moz.configure/init.configure
+@@ -375,9 +375,6 @@
+         sys.exit(subprocess.call([python] + sys.argv))
+
+     # We are now in the virtualenv
+-    if not distutils.sysconfig.get_python_lib():
+-        die('Could not determine python site packages directory')
+-
+     str_version = '.'.join(str(v) for v in version)
+
+     return namespace(
 --- a/build/moz.configure/toolchain.configure
 +++ b/build/moz.configure/toolchain.configure
 @@ -1619,8 +1619,9 @@
@@ -18,7 +30,7 @@
      def macos_sdk(sdk, host):
          sdk_min_version = Version('10.11')
 -        sdk_max_version = Version('10.15.4')
- 
+
          if sdk:
              sdk = sdk[0]
 @@ -170,11 +169,6 @@
@@ -31,5 +43,5 @@
 -                'your mozconfig. Various SDK versions are available from '
 -                'https://github.com/phracker/MacOSX-SDKs' % (version, sdk_max_version))
          return sdk
- 
-     set_config('MACOS_SDK_DIR', macos_sdk)
\ No newline at end of file
+
+     set_config('MACOS_SDK_DIR', macos_sdk)